The families and genera of cycads: A molecular phylogenetic analysis of cycadophyta based on nuclear and plastid DNA sequences

被引：59

作者：

Hill, KD ^{[1
]}

Chase, MW

Stevenson, DW

Hills, HG

Schutzman, B

机构：

[1] Royal Bot Gardens, Sydney, NSW 2000, Australia

[2] Royal Bot Gardens, Jodrell Lab, Richmond TW9 3DS, Surrey, England

[3] New York Bot Garden, Bronx, NY 10458 USA

[4] Univ Massachusetts, Sch Med, Dept Cell Biol, Worcester, MA 01655 USA

[5] Univ Florida, Inst Food & Agr Sci, Gainesville, FL 32611 USA

来源：

INTERNATIONAL JOURNAL OF PLANT SCIENCES | 2003年 / 164卷 / 06期

关键词：

molecular phylogeny; DNA; ITS; 26S rDNA; trnL-F; rbcL; cycads; Cycadales;

D O I：

10.1086/378538

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

A phylogenetic analysis of cycad genera was conducted using sequences of plastid rbcL ( coding), trnL-F ( largely noncoding) regions, nuclear internal transcribed spacers ( ITS), and part of the adjacent 26S rDNA gene. Trees were constructed from each region separately and a combined data set. The combined analysis yielded greater resolution but with a consensus tree that was not completely consistent with any published morphological studies or recent taxonomic classifications. The analysis supports a tree topology of ( Cycas (Stangeria (Dioon ( Bowenia (Macrozamia (Lepidozamia, Encephalartos)))), ( Ceratozamia ( Microcycas, Zamia)))). This topology implies inclusion of Epicycas in Cycas and Chigua in Zamia. Cycas is a distant sister to the remaining cycads, which form a coherent natural group, supporting recognition of two higher taxonomic groups.

引用

页码：933 / 948

页数：16

共 100 条

[1]

[Anonymous], FLORA AUSTR

[2] Phylogenetic relationships in phoradendreae (Viscaceae) inferred from three regions of the nuclear ribosomal cistron. I. Major lineages and paraphyly of phoradendron [J].